test/org/apache/pig/test/TestBatchAliases.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.pig.test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.IOException;
import java.util.Properties;

import org.apache.pig.PigConfiguration;
import org.apache.pig.PigServer;
import org.apache.pig.backend.executionengine.ExecJob;
import org.apache.pig.impl.io.FileLocalizer;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class TestBatchAliases {

    private PigServer myPig;

    @Before
    public void setUp() throws Exception {
        System.setProperty(PigConfiguration.PIG_OPT_MULTIQUERY, ""+true);
        myPig = new PigServer(Util.getLocalTestMode(), new Properties());
        deleteOutputFiles();
    }

    @After
    public void tearDown() throws Exception {
        deleteOutputFiles();
    }

    @Test
    public void testBatchAliases() throws IOException {

        // test case: key ('group') isn't part of foreach output
        // and keys have the same type.
        myPig.setBatchOn();

        myPig.registerQuery("a = load 'test/org/apache/pig/test/data/passwd' " +
                            "using PigStorage(':') as (uname:chararray, passwd:chararray, uid:int, gid:int);");
        myPig.registerQuery("b = group a by uid;");
        myPig.registerQuery("c = group a by gid;");
        myPig.registerQuery("d = foreach b generate SUM(a.gid);");
        myPig.registerQuery("e = foreach c generate group, COUNT(a);");
        myPig.registerQuery("store d into '/tmp/output1';");
        myPig.registerQuery("store e into '/tmp/output2';");

        boolean foundD = false;
        boolean foundE = false;
        for (ExecJob job : myPig.executeBatch()) {
            assertEquals(ExecJob.JOB_STATUS.COMPLETED, job.getStatus());
            foundD = foundD || "d".equals(job.getAlias());
            foundE = foundE || "e".equals(job.getAlias());
        }
        assertTrue(foundD);
        assertTrue(foundE);
    }

    private void deleteOutputFiles() throws Exception {
        FileLocalizer.delete("/tmp/output1", myPig.getPigContext());
        FileLocalizer.delete("/tmp/output2", myPig.getPigContext());
        FileLocalizer.delete("/tmp/output3", myPig.getPigContext());
        FileLocalizer.delete("/tmp/output4", myPig.getPigContext());
        FileLocalizer.delete("/tmp/output5", myPig.getPigContext());
    }
}